Opinions on GSO filters

[Lismore Bloke]

Looking for user opinions on the GSO eyepiece filters Andrews are selling. O-III, UHC and the broadband Nebula one. Are they any good or should I save up for the Astronomiks? Thanks, Paul.

[dpastern]

I presume you're referring to the baader filters? I've heard good things about the brand, but have no first hand experience myself. I'd be interested in also seeing what the experienced guys on here think.

Dave

[DavidU]

These ones
NEW! Nebula filter - broadband, with light pollution and skyglow nulls $ Neutral density filter (ND96/AD083) D=0.3. Has 50% light transmission $ Neutral density filter (ND96/AD084) D=0.6. Has 25% light transmission $ Neutral density filter (ND96/AD085) D=0.9. Has 13% light transmission $ NEW! OIII filter - narrow band, ultra high contrast (UHC), has emission and planetary nebulae peaks; OIII and H-beta enhancement $ Polarising filter (can use two in series to adjust light transmission level) $ Skylight filter - SCT thread type - discounted more! $ NEW! UHC filter - narrowest passband of GSO filters, for best results when viewing ring nebulae and most planetary nebulae, 500nm centred $
UV/IR blocking filter - discounted more!

[dpastern]

I must be going blind, I still can't see these...

Dave

[erick]

Down the bottom of this page:-

http://www.andrewscom.com.au/site-section-10.htm

All 1.25". I had wondered myself what they would be like?

[dpastern]

mmm...I still don't see them Eric (and that's the page I was looking at). Be careful, the Andrews site uses frames, so you might have inadvertently copied the link for the parent frame, and not the actual page you were after. Frames are horrid, and should *never* be used in a website. Period.

Dave

[MrB]

http://www.andrewscom.com.au/site-content-section-10-guansheng.htm#accessories

Fourth table up from the bottom of the page.

[dpastern]

Thanks, finally found them. They could be OK, or they could be average. Hard to say. Generally speaking, you pays for what you get.

Dave

[GrahamL]

Have a read here paul

http://www.cloudynights.com/ubbthreads/showflat.php/Cat/0/Number/3211988/Main/3180634

I have been thinking of trying there O3 as its sure not a lot of money.

[erick]

Ooops! Sorry. :ashamed:

[Lismore Bloke]

Thanks for the link Graham. Opinions of the O-III and UHC seem pretty favourable, especially considering they're about half the cost of the Baader and Astronomik filters.

[Ian Robinson]

Look at Lumicon filters .... they are dammed good.

You need to compare the filter transmission curves (amount of light passed with wavelength) and know what wavelengths of light pollution are being attenuated.

Go for 2" filters rather than 1.25" filters if you can , for obvious practical viewing and imaging reasons.